Patents by Inventor Ugo Bersellini

Ugo Bersellini has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fillers and pigments possessing organic polymer stabilizing properties and a process for their preparation
    Patent number: 4935063
    Abstract: Stabilizing inorganic fillers or pigments having simultaneous reinforcing effect and stabilizing effect on organic polymers are obtained by a process comprising the following stages:(a) bringing the inorganic filler or pigment into contact with a solution, in an inert organic solvent, of a sterically hindered amine comprising one or more alkoxysilane groups in its molecule;(b) maintaining the obtained mixture at higher than ambient temperature (20.degree.-25.degree. C.) for a period of at least 0.5 hours;(c) removing the solvent, treating at a temperature of 120.degree.-200.degree. C. and recovering the stabilizing filler or pigment obtained.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: June 19, 1990
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Silvestro Costanzi, Omero Zavattini, deceased, Ugo Bersellini, Damiano Gussoni